Plastic traveler



Aug. 17, 1943. I w, CAMP 2,326,832

PLASTIC TRAVELER Filed March 31 1942 PLAST/C/ZED CEALl/LOJf ESTER jayz APLAS7VC/ZED CElLULOJE EJTER PLAJT/C/ZED CELZULOJE 5675/? FLAJT/C/ZED CELLULOJE E37 1? I INVENTOR. WWHamflfCamp ATTORNE Y5 Patented Aug. 17, 1943 PLASTIC TBAYELER William M. Camp, Glen Ridge, N. J., assignor to The Clark Thread Company, Newark, N. .L, it corporationot New Jersey Application March 31, 1942, Serial No. 437,042

11 Claims.

This invention relates to travelers which are used on spinning and twisting frames in the textile industry.

In the past, travelers have been made of either steel or bronze, the bronze being used mostly on wet twisting, where the presence of water makes it undesirable to use steel. These travelers rotate around the ring at a high speed, and in the case of twisting where the drag on the traveler is heavy it is necessary to provide lubrication between the traveler and the ring, this taking the form of an oil or grease. Even under conditions of good lubrication, wear takes place on the traveler-and also on the ring and the fine particles of metal which are worn ofl become embedded in the grease and are subsequently oxidized and thus form visible stains on the yarns or threads. These stains consist of oxides,

carbonates, soaps, etc., of the respective traveler and ring metals, and are very difficult to remove in the ordinary processes of kier-boiling and bleaching.

Many attempts have been made to make travelers of materials, other than steel and bronze, usingmaterials including hard rubber and class. These materials, however, have not been satisfactory because of their brittleness and poor resistance against wear.

It is an object of this invention to provide a traveler possessing properties which have long been sought, including the following:

1. A longer life than steel or bronze travelers.

2. Requiring less lubrication than steel or bronze travelers or no lubrication.

3. Producing little or no wear on the steel ring and. therefore obviating the contamination of the yarn or thread referred to above,

4. Corrosion resistance, to avoid corrosion in wet twisting.

The invention will be further described by reference to the accompanying drawing, in which tate and cellulose acetate butyrate, i. ve., the mixed cellulose ester of acetic and butyrlc acids. Since plasticized cellulose, esters for the manufacture of molded or machined articles-are per se well known, it is not necessary to describe the composition and properties thereof. The proportion and kind of plasticizer, the proportion and kind of acid or acids combined with the cellulose and the kind of cellulose employed for esterification are details known to the art of making plastic cellulose esters and may be varied within the skill of this art, in the light of the present invention, to secure a cellulose ester product adapted to meet the preferrai criteria of this invention. These, briefly, are resiliency, toughness, shock resistance, abrasion resistance and corrosion resistance. Resiliency is desired because the jaws of the traveler are usually sprung apart in mounting on the ring. Toughness and shock or impact resistance are desired so that breakage will not occur. Abrasion resist ance is desired to avoid undue wear. Corrosion resistance is desired to avoid corrosion in 'wet twisting.

Having obtained the plasticized cellulose ester stock desired, the traveler is made therefrom by molding or machining from extruded or premolded stock. No details as to the structural form of the traveler are necessary because the various shapes and forms of travelers are well known now, and no details as to the process of molding or machining need be specified since the art 0! molding and machining cellulose esters is well known.

However, in some cases, it maybe desired to provide the traveler with a'metallic core, 1. e.. make a traveler having a metallic'core and a wearing surface comprising or composed essentially of a cellulose ester. This may be done, for example, by using a steel or alloy core or insert and molding the cellulose ester composition around said core so that the latter is embeded I molded product.

6. A travelerconsisting essentially of a plas- 10. A traveler consisting essentially of a plasticized cellulose ester. tlclzed mixed cellulose ester.

'7. A traveler consisting essentially or a plas- 11. A traveler having a metallic core and a. ticized cellulose nitrate. wearing surface composed essentially oi a'plu- 8. A traveler consisting essentially of a plas- 6 ticized cellulose ester.

9. A traveler consisting essentially of a plasticlzed 881101088 acetate. WILLIAM M. CAMP. ticized cellulose acetate butyrate. I 

